Improvement in dovetailing-machines



W. F. MODY.

DovetaIing-Machines.

30,148,840 Patented March 24.1874,

WMTNEEES \NvENTuR 'UNITED STATES PATENT FFIGE.

VILLIAM F. MOODY, OF CHICAGO, ILLINOIS, ASSIGNORl TO HIMSELF, CHARLES L.AMES, AND ABEL H. FROST, OF SAME PLACE.

IMPROVEMENT IN DOVETAILING-MACHINES.

Specification forming part of Letters Patent No. 148,840, dated March24, 1874; application filed i September 29, 1873.

To all whom it may concern:

Be it known that I, VILLIAM F. MOODY, of Chicago, in the county of Cool;and State of lllinois, have invented an Improvement inl)ovetaili11g-Machines, of which the following is a specification:

The object of the present invention is so to improve thedoveta-iling-machine patented by me April l, 1873, and numberedll, as toprovide means for removing the chips from the doveta-ils by withdrawingthe stuff, being worked, from the machine; and its nature consists in aradial arm which is attached to the shaft of the crank-wheel, drivingthe chisel, and rotated with it. The outer end of the arm is providedwith a spring-collar, which is so operated upon by a springnotched wheeland lever as to be moved in on the arm, and escape a stop in theinternal periphery of the drive-wheel when the chisel is to remove thechips from a doveta-il, the spring moving the collar outward to catchthe stop on the internal periphery of the wheel when the chisel is tohave a reciprocating motion. The notched wheel is operated by a lever,governed by two stops in its movement, as the whole is hereinafter'fully described and shown.

In the drawing, Figure 1 is a side elevation of my improvement indovetailing-machines5 Fig. 2, a front elevation thereof 5 Fig. 3, a rearelevation.

A B represent an arched frame-work and a bed or foundation supportingthe arch, constructed in substantially the same manner as the same partsin the patent referred to. a is the table on which the stuff to bedovetailed may be put. M represents the chisel running in guides J J ona cross-piece, I, and being operated by a pitman, K, connecting-joints Tm, and a crank-wheel, D, thelatterbeing driven by a wheel, C, in thesame manner as it is driven in the machine in my said patent, except ashereinafter described. The wheel C in this improvement runs loosely onthe shaft F of crank-wheel D, and is only made to turn said shaft andoperate the chisel M by the following means: An arm, t, is fastened tothe shaft F, and on its outer end is placed a sliding collar, S, whichis forced outward by a coil-spring, w, so as to catch on a stop, X,attached to the internal periphery of Wheel C. This arrangement is suchthat when the wheel C rotates the stop will carry the arm t around, andcon sequently turn the crank-wheel D. The collar S is carried inwardlyso as to allow the wheel C to rotate without driving the chisel, bymeans of a spring, a, which is fastened to the arched frame B, and itprojects into a notch in a wheel, H, so that when the latter is turnedby a lever, G, operating its shaft, the spring a will catch under thecollar S, as shown by its position in Fig. 2, and raise it on arm t, soas to allow the stop x on the wheel C to clear the arm and rotatewithout carrying it. This arrangement is such that the chisel M. will bebrought to a dead stop when it is at the bottom of the dovetail, asshown in all the gures, andin that position permit the dovetailed stuffto be withdrawn to remove the chips from the dovetail. The lever G,bearin g against the stop or pin L', is in position to hold the arm t onthe spring n; but when the wheel C is to carry or rotate the arm, thelever G is to be locked against the pin or stop L. Such locking causesthe wheel H to turn and release the spring u, and loosen the collar S,so as to catch on thestop X.

What I claim, and desireto secure by Letters Patent, is-

In a dovetailing-machine, the spring n, loose wheel C provided with astop, X, in combination with the notched wheel H, chisel M, pitman K,and crank-wheel D, substantially as and for the purpose set forth.

WILLIAM F. MOODY.

YVitnesses:

G. L. CHAPIN,

HARRY COLEMAN.

